// Expand and Contract on Z
// Start with a prime with slice begin = 0.5
// Omei Qunhua

integer dir = 1;
integer y = 50;
default
{
    state_entry()
    {
        llSetTimerEvent(0.2);
    }

    timer()
    {
        y += dir;
        if (y >= 99)     dir = -1;
        if (y <= 1)      dir = 1;
        float fz = (float) y / 50.0;
        llSetScale(<0.5, 0.5, fz>);
    }
}